Function _is_binary_writer

src/click/_compat.py:160–170

(stream: t.IO[t.Any], default: bool = False)

def _is_binary_writer(stream: t.IO[t.Any], default: bool = False) -> bool:
    try:
        stream.write(b"")
    except Exception:
        try:
            stream.write("")
            return False
        except Exception:
            pass
        return default
    return True


def _find_binary_reader(stream: t.IO[t.Any]) -> t.BinaryIO | None: